Glass-stopper machine



March 24, 1931. M. E. NAGLE GLASS STOPPER MACHINE F il'ed Dec.

1924 5 Sheets-Sheet 1 71 65.5 gg fg March 24-, 1931. E NAGLE GLASSSTOPPER MACHINE 5 Sheets-Sheet 2 Filed Dec. 8, 1924 a 7 Mi:

March 24, 1931. NAGLE GLASS STOPPER MACHINE 5 sheets-sheet 3 Filed Dec.8, 1924 N my u 1 lziw v m l 0 March 24, 1931. N E 1,797,920

' GLASS STOPPER MACHINE Filed Dec. 8, 1924 5 Sheets-Sheet 4 mains 6:1"

March 24, 1931.

M. E. NAGLE GLASS STOPPER MACHINE Filed Dec. 8, 1924 5 sheets-sheet 5removed.

Patented Mar. 24, 1931" MARCH n. nearin 'or CHICAGO irnieii'rs,

Innm'ors, assronon, BY Mnsnn ASSIGN- 'MENTS, 'IO OWENS-ILLINOIS GTLAssooMPANY, or 'TOLEIJ QOHIO', A CORPORATION 7 OF OHIO onnss-s rorrnnMACHINE Application fiIedMDecember S, Serial No. 754,469.

My invention pertains to machines for the manufacture of'glass pegstoppers, such as,

are commonly used with bottles containing perfume and which are usuallyof more or less ornamental design, and for the; production of similararticles of commerce;

One object of the invention is to provide improved means for dischargingthe cast stoppers from the molds or for -elevating them sufiiciently sothat they can be easily A further purpose of the invention is to supplya mold constructionof such character that scve'raltypesior styles andsizes of stoppers may be molded or cast simultaneously without danger-ofthe production of objectionable fins at theparting line or plane of ithe sections of the mold; v

Anot ier aim of the-invention is the production of an appliance of thischar'acter having plurality of mold-sections adapted to coop ratesuccessively with a single complementary mold-section, wherebyaneffective time saving is-possible since the mold-sections of the seriesmay be simultaneously under-go ing different operations incident to themolding'or casting action, for instance, one moldsection may bereceiving its charge-of molten glass, another performing the molding;operation, and a third delivering its cast articles. Such a constructionpermits the moldsection common to the several others to be Water-cooledand the latter to be air-cooled because they undergo the heatinginfluence con'iparatively infrequently.- 7

For the accomplishment,ofthese objects, I have devisedanovelmachine,representing" a desirable and preferredgembo'diment of the invention,whichl have illustratcd detail in the accompanying 'drawe g ingsforming; a part of this specification and throughout the several viewsof whichlikeo reference numerals have been. employed todesignatethe samemembers.

Inthese drawings:

and other Figure ,1 shows most of the machine in elevationwith a partthereof in vertical section;

FigureZgis fa horizontal section on line 2-,2 of Figure 1-; v

-Eigure 3 gives; a-central Vertiml section on an enlarged scale throughthe upper and lower mold-sections and their associated plungers, one ofthe latter being illustrated in sect on and the other in elevation;

Figure tis a top plan View of one of the lower mold sections Withcertain parts in sec- Figure is a horizontal section on line 5 50f;F.igure3; v

s Figure 6 is a plan View of the under face of the upper mold-section;

Figure '2' is a horizontal section on line V7'Zot Figure 1,; 7 I

Figures, 8 and 9 are Views of the ejector mechanism; I

Figure 10 is an enlarged, fragmentary, vertical section indicating oneof the molds for producing glass stoppers with undercutcharacteristicsrequiringa supplemental movable moldpart retractable topermit discharge of i the cast'stopper; p

'Eigure 11 shows the cooling water connections for the upper plunger;and

Figure 12 is a perspective view of a stopper having gundercut portionsrequiring the employment of a h 101d having the structuralfeaturesindicated in Figure 10. o

. Referring to thesedrawings, it will be perceived-that the applianceincludes a suitable frame-'01: table 21 with upstanding, guide rods orbars 22, QQadapt'ed; to guidetheupper,

' reciprocable, mold-section characterized as a whole'23, I p l gAjrevoluble table-top or turret 24, which maybe intermittently rotatedor turned stepby-step 'manuallyor in any other approved manner, carriesfive,,or any other appropriate number; of lower mold-sections 25,25.

Such table elementniay be conveniently V equipped With rollersz26.travelling; in a cir- 32 mounted on and projecting upwardlyfromthe-upper surface of the revoluble supportmay be demountably applied incorrect position on such member.

Above such base, I provide a main-body 33 of round shape having'acentral bearing 34 in register or coaxial with thelower bear ing 29 andhaving a depending, marginal flange 35 fastened'b'y screws36, 36 to thebase. T he top face of the main-body 33 has an annular channel or groove37 accommodating a plurality of sector-shaped mold-blocks 38, 39, 41,e2, 43, 44, 45, 4c, 47, as, 4.9 and 51 havingmold cavities in their topfaces which,

as to their forms and sizes, may be or all different or otherwise.

In the present instance, I have shown twelve such mold-members, but,of'course, any suitable or desired member could be employed. 7

These several, radially disposed moldmembers are securely fastened tothe mainbody 33 by screws 52, 52, all as is clearly illustrated' q i allalike As is fully depicted in Figure 3, the aligned bearings 29,"34'sliding1y accommodate a plunger 53 having a top, concave or dishedface 54 and having an intermediate, outstanding, round flange 55supplied on its outer edgewith one or more screw-threads 56.

The top face of that circular part of ele-' ment 33 between theplurality of annularlyarranged mold-members 3851 and thecentrally-positioned plunger 53 is equipped with radiating channels orgrooves '57 leading outwardly from the center to the sundry halfmoldcavities in the mold-members, whereby,

as will be explained hereinafter, the molten glass may be forcedoutwardly through such passages into the mold spaces.

the plunger 53, and, byaneans of the upper mold-section 23 and itsassociated parts, 'is forced orsqueezed outwardly into the twelvemoldsfso that the glass casting or product comprises a central,saucer-shaped part from which'thetwelve peg stoppers radiate.

It is necessary to elevate-or raise this peculiar-shaped casting fromthecorrespondinglyshaped, lower, mold-section, made 7, up 'of severalparts, and it is for this purposethat ingnember 24, whereby themold-section.

the one or more screw-threads 56 are supplied.

Each of the mold-members, in register with the neck of the glass-stoppercast therein, has a small, vertical, cylindrical hole 58 therethrough toreceive the upper correspondinglyshaped part of an ejector 59, the lowerportion 61 of which is square in cross-section and vertically slidablein like-shaped, aligned bearings 62 and 63 in the parts 33 and 55respectively.

Onitsunder face, the horizontal flange 55 has'an annular channel 64 intowhich the low er ends of the ejectors project, such parts of the latterhaving cross-pins 65 therethrough bearing against the under surface ofthe wall at the top of such channel so that when the plungerand itsflange move down, the several ejector-pins will be positively pulleddown simultaneouslyequal amounts.

In order that the series of ej ector-pins may be pushed up all at thesame time and equal distances to assist in lifting the cast stoppersfrom their lower mold-section, their bottom ends rest or bear on a flatring 66 closing the bottom of the channel and held in place by screws67.

A ring 68 surrounds the flange and has one or more screw-threads 69coasting with those of the periphery of the flange whereby partialrotation or turning of the ring will cause the elevation or descent, asthe case may be, of the central plunger 53 and the complementaryejector-pins 59, 59.

As is indicated in Figure 5, the flange 35 of the main-body 33 is cutaway on one side at 71 and occupying, and adapted to move in,

this space is a handle 72 fastened by screws 1 ure 12," and two of whichare indicated in Figure 4, it is necessary to make a part of 7 eachsuchmold movable with relation to the That is to say, a suitableamounto'f molten glass is deposited in the center of the mold oncylindrical mold-member 76 movable radially of the multiple mold intooperative and into inoperative positions and having an appropriate moldcavity on its inner face to form a portion of the stopper-head.

This mold element 76 has an outwardlydirected shank 77 square incross-section and provided with an intermediate, recess '78, into whichprojects the shorter arm 79 of a bellcr'anlrlever fulcrumedat 81, in acavity in part 33,,the longer arm 82 ofthe bell-icraiik leverextendinginto an opening 83 in a horizontal ring 84 surrounding andturnable on theupperpa'rt 85of1the body 33 of slightly;

- and 131-having mold cavities or recesses cor-.

reduced diameter; c

'Thisexternal ringl84- has "an outwardlyp'rojecting handleS-S by means.of which it maybe turned,-its movement being limited in both directionsby a stationary stop or abutment 87 on the body 33 extending into a slot88 in the ring provided-for that purpose. 1

It shouldbe noted in passing that the out er end of the stem or shank 77is slightly bevelled at 89 (Figure 10) for a purpose hereinafter stateThe single, upper mold-section 23 is supported from above" from a tophorizontal cross-bar 91 vertically slidable on the guides 22, 22, theopposite ends of suchelement 91 beingpivotally mounted on apair ofeccentric-rods 92, 92, actuated by eccentrics 93 93 on asuitably-journalled shaft 94 below the table top and'equip ped-at oneend with an operatin handle 95 by means of which it may be rocked; I

Cross-bar 91 is centrally apertured for the reception of the -upper endportion of an upright, threaded rod 96, adjustablyfixed to the bar bynuts 97 and 98 on th-erod bearing against the upperand lower faces ofthe bar.

Also mounted in similar adjustable manner on the rod v by a pair of nuts99 and101, I provide a 1 substantiallysquare horizontal plate 102havingfour vertical holes therethroughnear its corners which slidingly receive the upper end parts of four bolts 103 c the heads of which areabove and normally support other elements, about to be described, byresting on the top face of the plate.

The lower'en'ds of such bolts are screwed into threaded holes in a plate104, coiled compression springs 105 surrounding the bolts hearing attheir opposite ends on the under face of the upper plate and 'on the topface of the lower plate, whereby the latter'may yield or give somewhatupwardly.

By means oftwo screws 106, plate'104carries beneath it a smaller plate107, the two being centrally apertured in register 'fcrthe accommodationof the upper plunger or piston to be described. v I

Also by means of screws 108, plate 107 supports a round body 109'liaving an annular channel 111 in its top face, covered by a ring112,-a nd divided by a cross-partition-wall 113 atone point only.(Figures 3 and 6.).

Cooling water or other appropriate hea extracting fiuidis admitted tosuch channel at one side of the division wall through-a pipe ortube 114and the heated water or other fluid isdischarged'from' the channel onthe lar groove 116,.correspondingto the groove."

37 of the lower mold-section,in whichyby' {,5

means of suitable screws117, are held the twelve complementarymold-blocks 118', 119, 121, 122, 123, 121, 125, 126, 127, 128, 129

responding to those ofzthe lower blocks 37,

as, 39, 11, 12, 13, 11,115, 46, 417, 48, 19, and 51 respectively. 7

1 ihuswhen such upper mold-section 1s assoclated with. any one of thefive lower moldsections, twelve complete mold cavities will.

l/Vhere each such mold is employed, the

member 109 is fitted with a downwardly-projecting wedge-block 132 (Fig.10) which in the closed condition of the mold bears against the end ofthe shank 77 and holds the movable mold part 76 immovably in properactive position. 1

Across-bar 133 is fastened in any approved manner on the lower end ofthe upright, stationary screw-shaft 96, itsopposite ends being notchedat 134, 134 to accommodate and be guided bythe vertical rods 22,122.This bar 133 also has two holes 135, 135 therethrough slidinglyreceiving two rods- 136,136 fastened-to and upstanding from the plate104 so that the latter and the parts which it carries. are correctlyguided in their vertical reciprocations.

Bar 133 is-fitted with two, pivoted catches 137, 137 (Figure 1 the upperbevelled ends of which cooperate with the conical surface of anut 138adjustable on the screw-shaft 96, such nut normally holding thecatcl1esinop erat-ive or active position, whereby they fit unsuchplunger. having a convex surface 144 complementary to, the concave face54.

Internally, plunger 141 has a division-wall 145 (F igure 3) reachingfrom the top almost to the bottom thereof, and the head 139 is equippedwith an entrance water-pipe 146 (Figure 1) connecting with the interiorof 1 the plunger at one side of the partition-wall and with a waterdischarge-pipe 147 at the opposite side of such wall, whereby the waterflowing through the plunger effectively cools it.

As is indicated in Figure 3, the p'ortiono'f the member 109 between thechannel or groove 116 and'the plunger-bearing 143 is recessed or cutaway at 148at points corresponding to the mold cavities to form suitablechannels with the mold recesses in association with the companionregisteringpassages 57 a In order to register the lower mold-sections,as they are turned into place, approximately with the single, upper,reciprocatory moldsection, the body 33 is provided with a suitablenumber, in the present instance three, of round holes 151,151 in itstopface and the under portion of the member 109 is equipped with a likenumber of downwardlyprojecting pins 152, 152 designed to enter.

such cavities.

The final, exact registration, however, is effected by other means, asfollows:

Member 33 has a slightly-tapered annulargroove 153 extended around itsinner edge, but such groove is omitted at three points providing a likenumber of tapered projec tions or lugs 154, 154.

Member 109, on-the other hand, has an inner, tapered, circular rib 155on its under face cut away atthree points 150, 156 to supply that numberof slightly-bevelled recesses designed to receive the lugs 154,154,,the' groove 153 of course accommodating the rib 155.

A very important feature'of the invention has yet to be mentioned.

Inasmuch as the hot, molten glass is supplied or forced intothe twelveradiating mold cavities from a central supply, the inner portions of themold-members directly adjacent to such supplybecome more heated than theouter portions and consequently expand to a greater extent. I

It is essential'that' the upper and lower mold-sections shouldfittogether accurately and closely without substantial space'betweenthem at any point, otherwise, particularly under the pressure exerted onthe central molten supply of glass to squeeze or force it to completelyfill all of the 'severalunolds, it will be expressed into such space orspaces forming objectionable fins on the stoppers and rendering themunsatisfactory to the trade. I

To secure such precise and exact fitor adaptation of members and theavoidance of the production of the fins or flanges referred to, the topfaces of the several lower mold-members 38-51 are slightly inclined sothat in very small degree they slope downwardly inwardly toward thecenter and the bottom surfaces of the correlated, upperniold-members118131 incline upwardly inwardly slightly.

Thus, when the machine is in operation, the two sets (upper and lower)of moldmembers expand and form a close accurate fit between themthroughout the extentof their contacting surfaces eliminating thepossibility or likelihood of any of the molten glass leaking betweenthem, even though it is under great pressure, and producing thedetrimental Or harmful thin projections specified.

At first thought, it would appear that those molds having the greatersize of cavity for the manufacture of stoppers of greater dimensionswould require more slope or taper of the character stated than thosevhaving mold reccssesof lesser volume, because of the greater quantitiesof molten glass which they receive, but I have discovered that this isnot true and I have ascertained that those mold-members having thegreater amount of metal in them and consequently having the smaller moldspaces are the ones which expand the most. 7

These, therefore, require a greater degree of slope or inclination orneed to be cut away more to produce the required accurate fit betweenthe parts, and they are constructed in this manner.

It is to be understood, therefore, that the numerous mold-members are ormay be tapered in varying degree depending upon the shapes and sizes oftheir mold spaces so that under the action of the heat imposed on themthey wil all expand in such manner and in such amount as to obtain thecomparativelyexact, smooth fit between the upper and. lowermold-sections, each of the latter, as indicated, having several suchmold-members.

The operation of the novel machine occurs practically as follows:

Assuming that the upper mold-section and its sliding plunger are beingcooled by the infiowing and outgoing water, and assuming that by meansof the handle 86, all of the previously-retracted, movable, mold parts76, of the lower mold-section 25 in the position indicated as'A, Figure2, have been pushed in into'operative position, a correct amount ofmolten glass is deposited in the saucer-shaped receptacle 54 of thelower plunger 53 while the latter is in its lowered position. v p

Then the table is swung around one-fifth of a revolution to bring backsuch glasscharged lower mold element 25 beneath the then-elevated, uppermold element 23.

Thereupon, by manipulation of the operating handle 95, the uppermold-section 23 and its associated plunger 141 are caused to descenduntil such part 23 rests upon the corresponding lowerpart 25, theirprecise registration being'assi sted by the cooperating elements 151,152 and 154, 156.

Continued downward turning of the handle causes the companionmold-sections to be firmly forced together by the increasing pressure ofthe springs'105 and the upper plunger, 141 during its further descent,engages the top of the molten glass charge and forces it radlallyoutwardly to fill the twelve,

complete mold-pockets, whereby there is produced a saucer-like, central,glassbody 157 (F-igure having'twelve radiating stoppers attached theretothe stem of each of Which has a section 158 of materially-re'di1cedcross- "section so'that the stopper properv may be easily broken offfrom the central body at this point; the latter being later remelted aspartof a subsequent glasssup'p1'y; r i

1 Then the top niold section and its plunger of the molds permittingtheir manual removalfi oin the machine at vvhich time the glass *"hasetol ed' sufficiently to permit the breaking "o'flof-thestoppe'rs fromtheir temperary, com- "men, (central) glass sup ort.

I At the time of thearrival of such moldsection, during its intermittentrotarjr movement, the position Aor beforereaching sheh tttt-ih jthgtwohandles vsz ahid'se are itu'rned to lower the ejectonpin's and thecathpanion' plunger andto push inthe inoldparts '76 to active position;

The uppe mold-"section is dgqt't tely "c ti d by the vvater sec'ihea'tthd the lower ii oldsections are also siifiiciently cooled byreason otthe' fact that there'is an anipleinum- -ber of them heated insuccession With-enough ti-me betvveen heating periods for anyone so"that-it does not become undulji'h'eated or over- "exptthded. 1

Because all of the e'jectorsffare' actuated by a coinmon element; thejrifigg'jee; any Wear'o'c- "currin in the operating: mechanism of thelatter shows itseil'ec't equally on all of theej ector s' a ndthere issiire'to be an qual 'misihg action on allthefstoppers and thebent' f'alhody'unde'r all conditioliS, Whichjis' desirable "oressential to prev ntany of'thefstoppers from breaking ofi rematurely requiring them tobepicked out of the molds individually b'yfha'nd." f I Those skilled in,this'art ill .readily understand that thi's inyention is notliniited orre stricted to the precise and, exactdetails of structure presentedandthat many more or less vradicalchanges may-be incorporated i'n theappliancewithout departure from the substance and, essence ;of theinvention and Without the sacrifice" of anyof its material benefits andadvantages, for instance; instead of having'bothof the meetingsurfa'ces' of the upper and lower mold-sections inclined sor slopedinopposite directions;-theentire i'nclinations maybe provided on eitherone only of such mold-sections.

IcIaim:-

1. A] mold-section having a cavity to receive-a charge of moltenmaterial and 'a plurahty of mold-recessescommunicating vvith saidcavity, the surfaceof sai'd mold-section adapted to contact with thecorresponding corresponding surface of a 'coinpleniehtai y' in'oldsection' sloping toward said central cavity tocomp ensate for the'greater exp-ah sion ofthe part of such mold-sectionneai'est 'saidc'av-ity;

3; A inold section having a cavity to receive a charge of 'moltenmaterial metammunicati ng With a plurality of mold-recesses of differentcapacities, the "surface or said 1no1d=section adapted to contact withthe corresponding "surface of a'compler'nehtary moldsect-ion slopingtovvard said cavity in varying degree depending upon the sizes ofthem'ol drecesses to compensate for the greater expansion of the parts ofsuch m0ldse cti0n neatest said cavity; a t

4; A mold se'ction having a central cavity toree'eiv'e a charge'ofmolten material and including aplurality-of separate mold-blocks havingmold-recesses of different shapes, said cavity communicatingwith saidseveralinold recesses, whereby th'e'latterinay receive their supply-ofmolten material -from "such cavity,

thesu-rface's Ofsaid mold-blocksadapted to Contact Witli thecomplementary 'surfaces of a companion mold-section" sloping toward saideentral cavity.

' 6. A pair of co-operatin'g mold-sections unitedly providing a cavityto' receive acharge of molten rn'aterial and a plurality ofmold-recesses communicating withisaid cav- 1ty,' the contactingsurfacesof sai'dimoldfi-sect ti'jon's sloping toward said cavity t'o'compensatefor the vgreater expansion of the parts of themold-se'ctions nearestsaid cavityi 7. In: ainiachine' of the character-described, thecombination ofa pair of separable molda .110 61A pairot 'coroperating'niold-sectiohs ,un-ited'ly'formlng' a cavity to receive a charge pmeans to force apart ofa molten glass sections for-the production of amain glass body having a plurality of. glass stoppers extendintherefrom, a plunger to lift said body from one of said mold-sections, alifting pin for each of said stoppers toraise them from saidmold-section simultaneously [with the elevation of said body, andoperating means common to said plunger and pins to raise them equallyand to lower them together; positively, whereby any wear in saidoperating means equally afi'ects the movements of said plunger and pins;1 l r 8. In a machine of the character'described, the combination of amold-section'having a central bearing for a plunger and aplurality ofradiating glass-stopper mold-cavities com municating V with th spaceabove [said plunger, acompanion mold-section movable relatively to saidfirst mold-section,a plunger reciprocable in said-bearing and having anoutstanding flange, anejector for each of said mold-cavities slidable insaid first mold-sec.- tion and connected with said flange to partake ofthe movements of the latter, means to force a part of a molten-glasssupply deposited'on said plunger into said mold-cavities, and a singlescrew mechanism to raise and-lower said plunger and its flange, wherebythe central glass body formed above the plunger and the several castglass-stoppers attached there to may be raised simultaneously andequally mold-section. A 7 H V a V 9. In a machine of the characterdescribed, the combination of a mold-section having a central bearingfor a plunger and a plurality of radiating glass-stopper mold-cavitiescommunicating with the space above said plunger, acompanion-mold-section movable relative to said flrst mold-section, aplunger reciprocablein said bearing and having an outstanding flange, anejector for eachof said mold-cavities slidable in said firstmoldsectionand connected-with said, flange to partake of the movements of the.latter,

to facilitate their removal fromsaid first supply deposited on; saidplunger into said mold-cavities, ascrew-thread ion the periphery of saidplunger-flange, a ring I surrounding said flange having a .screwthreadco-operating withsaid flange-thread and means by which said ring may beturned to raise and lower said plunger and its flange and the pluralityof ejectors. a 10. In a machine ofthe character described, thecombination of a lower moldsection having a central bearing and a'plurality of radiating mold-cavities, aV-plunger with a concave upperface reciprocableiin said bearing, an upper companion moldsection havinga bearing'in' register with said first bearing and a plurality ofcomplementary radiating mold-cavities, a" plunger having a convex'bottomface reciprocable in the bearing of said upperzmol'd-section,

means tofimove said mold-sections toward and from one another relativelyto open and closefthe complete mold-cavities, a slidableejectorassociated with each of the mold-cavities of said lower mold-section,-

means to operate one of said plungers to force a portion of themoltenglass supply depos ited on said lower plunger outwardly lnto saidmold-cavities,-and means to positively raise and-positively-lower saidlower plunger and ejectors simultaneously and equally to deliver theglass casting from the lower moldsection.. V I

11. In a machine of the character described,the combination of a lowermoldsectionhaving a central bearing and a plurality of blocks havingradiating mold-cavities of diflerent. capacities, a plunger with aconcave upper face reciprocable in said bearing, a companionmold-section having a. bearing in registe'r'with said firstbearing and acorresponding number of mold-blocks with complementary radiatingmold-cavities, a plunger with a-convex bottom face reciprocable in the;bearing of said up er mold-secs tion, means to move said mol -sectionsto ward and from one another relatively toppen and close the completemold-cavities, means to depress the upper plunger to force a ortioniofthe molten-glass supply deposite on the lower plunger outwardly intosaid moldscribed, the combination'of apair of separable; complementary,mold-sections unitedly having amolten-glass supply-recess communicatingwith a plurality of mold-spaces, the

contact face of at least one of said mold-sectiions sloping toward saidrecess to compensateffor the difierence in expansion throughout itsextent, amoldgelement in each of said mold-spaces, "and means tosimultaneously "shift said mold-elements into operative or inoperativeposition;

. '13. In a molding machine, the combination of a reciprocatorywater-cooled mold-section having a plurality of radiating mold cavitiesof diflerent capacities, a series of air-cooled complementarymold-sections each having a central cavity to receive a charge of moltenglass and a plurality of mold-cavities which are counterparts ofthoseof'said first moldsection and which communicate with saidcening'sur'faces ofsaid' fitted mold-sections sloping relatively to oneanother in Varying degree depending upon the sizes of the moldcavitiesto compensate for the greater expansion of the parts of themold-sections nearest said cavity.

In Witness whereof I have hereunto set Iny 7 hand.

MARCH E. NAGLE.

